My cheese fridge was partially destroyed at the start of July. A car crashed into a power pole carrying both a 22kv distribution line and the 230v line for our house. They . touched . briefly It turns out a…

I’m a big fan of hMailServer, but the documentation for setting up SSL certificates and the certification chain is a bit lacking. The easiest way to check if hMailServer is setup correctly is to use OpenSSL. openssl.exe s_client -showcerts -connect…

Don’t forget that at 2:40am, 14 July 2017 (UTC) the Linux epoch will hit 1,500,000,000 (1.5 Gigaseconds). Visit https://www.john.geek.nz/epoch to watch the excitement! It hit 1,000,000,000 back in September 2001 and it won’t hit 2,000,000,000 until May 2033.

I’ve always planned to monitor my electricity usage. I had previously (about a year ago!) ordered some power transformers from seeedstudio and a six channel ADC for simultaneous three phase current and voltage measurement but never got around to starting…

Before you can program the ESP8266, you need to wire it up. First things first, the ESP8266 uses a 2mm pin spacing so you can’t use a standard breadboard as these use a 0.1 inch spacing. It also uses 3.3V…

About a year ago I put up some money for the Wino-Board kickstarter project, received my Wino-Boards and did nothing with them for 12 months. They are effectively a tiny Arduino board attached to the innards of an ESP8266 WiFi…

I’m currently involved in a project to set up a solar powered wireless station and wanted to remotely monitor the battery charge process. I looked into a number of charge controllers to see if any of them could be connected…

If you’re after a binary of dump1090 for the Raspberry Pi without having to build it, here’s a compiled binary for you. I built it on Arch linux, but it also works on Raspbian, or likely any other Arm processor…